[Right internal mammary artery reimplantation into the left internal mammary artery. Y anastomosis. 25 cases]. / Réimplantation de l'artère mammaire interne droite dans l'artère mammaire interne gauche. Montage en Y--vingt-cinq cas.

ABSTRACT

Distal latero-circumflex arteries (DLCA) and posterior descending artery (PDA) are anatomically too far and cannot be revascularized with internal mammary artery (IMA) by a conventional procedure. The reimplantation of the right IMA into the left IMA in situ increases (2 times) the length of right IMA graft available. Fifty-five patients underwent this technique. Their preoperative status was 22 males, 3 females; mean age 57 years, 38% myocardial infarction (MI). Coronary angiography showed stenosis of the left main coronary artery 3; stenosis of 3 vessels 15; 2 vessels 10; 2.3 anastomoses by patient were performed with Y right and left IMA procedure 24 LDA, 8 diagonals, 25 DLCA and 1 PDA anastomosis. No deaths were observed in this short series. Morbidity was 1 MI, 2 sternal sepsis, 1 bilateral phrenic paralysis (all were cured without sequelae). To date (March 90) 15 patients have been followed for 3 to 12 months, 12 are angina-free, 3 are significantly improved, 11 have a negative exercise test. Thallium test is normal in the revascularized area in 14 patients. Seven angiographies have been performed (6 months to 1 year) and all Y right IMA are patent.